Machine for making saddle-seats for chairs.



' PATENTED AUG, 25, 1903.

W. HLHOBBY. MACHINE FOR MAKING SADDLE SEATS FGR CHAIRS.

APPLIGATION FILED FEB. 27, 1902 z SHEETS-SHEET 1.

Eden-"501";- w H Hobb No. 737,235. PATENTED AUG. 25 1903.

r w. H. HOBBY.- MACHINE FOR MAKING SADDLE SEATS FOR CHAIRS.

.APPLIOATION FILED PER. 27, 1902.

N0 MODEL. 2 SHIIiTS-iHBBT 2.

' l2 m ml2 Miran STATES Patented'August 25, 1903.

PATENT met.

WILLIAM H. HOBBY, OF GARDNER, MASSACHUSETTS.

SPECIFICATION forming part of Letters Patent No. 737,235, dated August25, 1903.

Application filed February 27,1902. Serial No. 95,924. (No model.)

ful Machine for Making Saddle-Seats for Chairs, of which the followingis a specification.

This invention relates to that class of chairseat-making machines inwhich the work is presented to a cutter by a horizontally-movablecarriage which is also tipped or tilted, so that by one passage over arotating cutter the chair-seat will be scooped out according to anydesired pattern.

The especial object of this invention is to provide an improvedconstruction for operating the carriage and improved devices forclamping the work in the carriage.

To these ends this invention consists of the parts and combinations ofparts, as hereinafter described, and more particularly pointed out inthe claims at the end of this specification.

In the accompanying two sheets of drawings, Figure 1 is a side view of amachine constructed according to my invention. Fig. 2 is a transversesectional view of the same. Fig. 3 is a plan view of thecarriage. Fig. 4is a perspective view of the carriage. Fig. 5 is a detail sectional-view of the carriage. Fig. 6 is a detail view of the spring for raisingthe central clamping-plate. Fig. 7 is a detail view of one of the frontpattern-plates, and Fig. 8 is a detail View of one of the rearpattern-plates.

V In order to cut out a'depression of the desired shape in a saddle-seatfor a chair, it is a tion are to improve the carriage feeding and rcontrolling connections ina machine of the ing mechanism for holding thework rigidly in place in the carriage, so as to enable me to produce abetter grade of work and at higher speeds than has heretofore beenpossible. To accomplish these results, the carriage-actuating mechanismof a machine constructed according to my invention consists,essentially, of actuating-slides which are flexibly connected to thecarriage, so that the carriage may be tipped or tilted independently ofits actuating-slides. In the specific con.- struction which I haveherein illustrated the actuating-slides are arranged in guides on theframe of the machine, one at each side of the carriage. Each of theslides is provided with a rack which meshes with and is driven by a gearsecured on a feed-shaft. Mounted on each of the slides are two slottedbearingpieces, each of which receives an arm projecting out from thecarriage. Mounted in each of the bearing-pieces is a spring having ascrew for adjusting its tension. The carriage isprovided substantiallyat each of its corners with a bearing piece or roller which I runs on apattern-plate, so that by means of this construction a loose connectionwill be provided between the carriage and its actuating-slides, whichwill permit the carriage to be tipped or tilted, while by properlytensioning the springs in the slotted bearing-pieces the work will beheld down onto the cutter with sufficient rigidity to insure theproduction of high-grade work even when the machine is being operated athigh speed.

Referring to the drawings for a detail description of a machineconstructed according to my invention, the machine, as illustrated,comprises a frame 10, mounted on which are the angle-irons l1.Detachably bolted to the angle-irons 11 are the pattern-pieces 12., fourseparate pattern-pieces being preferably employed, so that room may beleft at the center of the machine for the bearings of the cutter-shaftand feed-shaft. The form of pattern-plates 12 may be variedaccording tothe style of chair-seat which it is desired to produce. In practice thefront pattern-pieces, as illustrated in Fig. 7, are each provided with acentral rise, and the rear pattern-pieces are each provided with acentral depression.

The construction of the carriage in which the work is mounted is mostclearly illustrated in Fig. 4. As shown in this figure, the carriageconsists of a steel frame comprising the side bars 13 and end bars 14.Adjustably mounted on the side bars 13 are crossbars 15. The cross-barspreferably have the form of box-girders and may be set into engagementwith the sides of the Work, as illustrated in Fig. 3. Planed into andsecured'in the adjustable cross-pieces 15 are supports or ledges 19. Onthe front bar of the carriage I secure the adjustable spurs 18, againstwhich the-work is driven from the rear side.

Carried by the cross-pieces 15 and adj ustably secured thereto by bolts17 is a center piece 16, which forms the support for the clampingmechanism which holds the work down in place. This clamping mechanism ismost clearly illustrated in Figs. 1 and 2. As shown in these figures,the center piece 16 is provided with slotted standards 20, adjustablymounted in which are the journal-boxes 21, which receive the shaft of acam-clamping handle 22. The clamping-plate 23 is normally lifted by aspring 24 and maybe forced down into engagement with the work by theclamping-handle 22, the position of the journal-boxes 21 of theclamping-handle being adjusted by screws 25.

.To prevent a transverse motion of the carriage, the carriage isprovided substantially at each corner with a slotted bracket 40, whichextends down inside the angle-irons 11, as shown in Fig. 2, and mountedin each of the slotted brackets 40 is a bearing-piece 41, which issecured in place by a bolt 42 and which may be set to differentpositions by a screw 43, as illustrated in Fig. 5.

Mounted on the frame of the machine, at each side of the carriage, areguide-pieces 26, movably mounted in which are actuatingslides 27, havingracks 28, which mesh with gears 29, secured on, the feed-shaft 30. Thefeed-shaft 30 is ordinarily operated from a hand-wheel 31, although itmay be driven by pulley 32 from a belt from any siutable source ofpower, if desired.

Mounted on each of the actuating-slides 27 are two slotted bearingpieces 33, each of which receives an arm 34, extending out from the sideof the carriage. Mounted in each bearing piece 33 and pressing down onthe arm 34 is a spring 35, the tension'of which may be adjusted by ascrew 36, so that the carriage will be held down to its work with anydesired degree of pressure.

Journaled in the frame 10 is a transverse cutter-shaft 37, havingapulley 38, which may be driven by belt from any suitable source ofpower, and secured on the cutter-shaft is a molding-cutter of specialoutline or form,

designed to produce the desired shape of cut in the under side of thework as the same is presented to the cutter by the travel and tiltingmotion of the carriage.

I am aware that changes may be made in practicing my invention by thosewho are skilled in the art without departing from the scope thereof asexpressed in the claims. For example, instead of using bearing-pieces41, running on the pattern-plates 12,1 may provide supporting-rollersfor this purpose, although in practice I prefer to use the solidbearingpieces in order that the carriage may be controlled with thegreatest possible rigidity.

I do not wish to be limited to the special construction I have hereinshown and described; but

What I do claim, and desire to secure by Letters Patent of the UnitedStates, is

1. In a machine of the class described, the combination of a carriagefor presenting the work to the cutter, and actuating-slides havingslotted bearings for receiving arms projecting from the carriage so thatthe carriage may be rocked or tilted transversely to its line of travelindependently of the actuatingslides.

2. In a machine of the class described, the combination of a carriagefor presenting the work to the cutter, an actuating slide movablymounted on the frame of the machine at each side of the carriage, andspring-pressed connections between the actuating-slides and carriage topermit the carriage to be rocked or tilted transversely to its line oftravel.

3. In a machine of the class described, the combination of the carriage,an actuatingslide mounted in the frame of the machine at each side ofthe carriage, a pair of slotted bearing-pieces carried by each slide inposition to receive an arm projecting from the carriage, a spring ineach bearing-piece normally tending to prevent the sides of the carriagefrom rising, means for adjusting the tension of said springs, and afeed-shaft geared to simultaneously operate the slides.

4. In a machine of the class described, the combination of thepattern-plates, a carriage having bearing pieces or rolls resting on thepattern-plates, an actuating slide movably mounted at each side of thecarriage, two slotted bearing-pieces mounted on each slide to receivearms projecting from the carriage, springs normally holding the carriagedown into engagement with the pattern plates, means for adjusting thetension of the springs, a transverse feed-shaft, and gears mounted onthe feed shaft in position to engage the racks of the slides tosimultaneouslyactuate said slides.

5. In a machine of the class described, the combination of a carriage,means for supporting the work in the carriage, a clampingplate forholding the work down on its supports, and adjustable means foractuating the clamping plate, adapted to clamp difierent my hand in thepresence of two subscribing thicknesses of stock in place in thecarriage, Witnesses. comprising vertically-movable journal-boxes, screwsfor regulating the position of the jour- WILLIAM HOBBY 5 nail-boxes, anda, clamping-handle having its Witnesses:

shaft mounted in the journal-boxes. PHILIP W. SOUTHGATE,

In testimony whereof I have hereunto set JOHN F. OROWELL.

